Automatically-locked gear-box.



N. ROE.

`AUTOMTIGALLY LOGKED GEAR BOX.

. APPLICATION FILED DEO. 12, 1910. 1,006,405.

Enventors witnesses attorneys NATHANIEL ROE, PATCI-IOGUE, NEW YORK.

AUTOMATICALLY-LOCKED GEAR-BOX.

Specification of Letters Patent.

Patented Oct. 17, 1911.

Application led December 12, 1910. Serial No. 596,786.

To all whom it may concern:

Be it known that l, NATHANIEL Ron, a citizen of the United States,residing at Patchoguc, in the county of Suffolk and State of New York,have invented certain new and useful Tmprovements inAutomatically-Locked Gear-Boxes, of which the following is aspecification.

This invention relates to gear boxes, and more particularly to thatclass wherein the gears are automatically locked at any desiredposition.

The object of my invention is to construct a gear box, consisting of abox proper having arranged therein in a compact and unique manner twogears in mesh, and a weighted pawl, with means for driving the gears andcontrolling the pawl.

1With these and further objects in view, as will in part be hereinafterstated, and in part become obvious, the invention comprises certainnovel constructions, combinations and arrangements of parts, ashereinafter specifically claimed.

In the drawings z-Figure 1, is a perspective view, Fig. 2, is asectional view and Fig. 3 is a detail view. Figs. t and 5 are detailviews.

Referring by numerals to the drawings, 1 represents the casing orhousing consisting of a square box cast with flanges 2, said flangesbeing provided with apertures 3, adapted to receive bolts or screws forsecuring the box to the side of a window or building, as may be desired.Secured within the box in any desirable manner is a yoke t, pivotedbetween the respective ends of which is a pawl 5, said pawl beingprovided with a flange 6, having a slight depression 7, in the centerthereof and corresponding weights 8. This yoke is formed with an arm 9,the end of which is enlarged as shown at 10, said enlarged portion beingprovided with a vertical central bore 11, and a horizontal central bore12, the bore 12 being provided with a groove or channel 13. Thisenlarged portion is also provided with a sleeve 14, which prolongs thebore 12, and a flat bearing surface 15, surrounding the bore 11, asclearly shown in the drawings.

Mounted outside of the sleeve 14C, is a small gear 16, having a sleeve17, which ts an aperture 18, in the top 19 of theJ box, said top beingsecured upon the box 1n any desirable manner. This sleeve 17, isprovided with a square bore 20, adapted to receive the crank.

Mounted on the flat bearing surface 15, upon a shaft 21, which fits intothe bore 11, and projects through the wall of the housing is a gear 22,normally in engagement with the pawl 5, said gear 22, being in mesh withvthe gear 16. The shaft 21 which is adapted to be driven by the gear 22,is provided with a sleeve 23, for the reception of a driving rod adaptedto operate any mechanism wherein an automatically locking gear may beemployed.

The crank 24C, is provided with a square lug 25, adapted to ft snuglyinto the square bore 20, the lug 25, has a central bore 26, in which ismounted a shaft 27, provided upon one end with a handle 28, and upon itsother end with a short angular arm 29, adapted to pass through thegroove or channel 13, and to engage the flange 6 and the depression 7therein upon the'pawl, this arm 29, is also adapted to engage a recess30, in the portion 10, which locks the shaft 27, against rotation.

Mode of operation-. The parts being assembled as described, the handleis inserted. The small handle upon the shaft 27, is turned up so thatsaid shaft can be shoved in, until it is brought in contact with theflange 6, the handle 28, is then turned down so as to force the angularshaped arm 29 up against the iiange 6 and into the depression 7, whereit is firmly held by said depression and by the weight of the handle 28,and when in such a position, the pawl 5, is released from the gear 22,thereby permitting the turning of the crank 24;, and the movement of thegears in order to drive the shaft 21, which in turn drives the mechanismto which it may be connected.

It will be noted that upon raising the handle 28, the gears become atonce locked as the pawl immediately engages the gear 22, and when insuch a position, the crank and the shaft carried thereby may bewithdrawn. The pawl may be further locked or held in a disengagedposition by slightly pulling the shaft carrying the handle 27 out, so asto force the angular arm 29 carried thereby into a recess 30, as clearlyshown in Fig. 2.

It is thought that the invention wlll be fully understood by allconversant in such matters, the extreme simplicity rendering anelaborate description unnecessary.

Having thus described the various features of my invention what I claimas new and desire to secure by Letters Patent is:-

l. In a crank box, in combination with the box proper, a yoke secured insaid box, a weighted pawl pivoted between the respective ends of theyoke, said yoke carrying` a boss, a horizontal bore in the end of theboss, a vertical bore in said boss, gears in mesh mounted upon the boss,a crank for operating one of the gears, a shaft carried by the crank,said shaft being adapted to pass through the said horizontal bore, anarm carried upon the end of said shaft, said arm being adapted to rais-ethe said pawl, means for locking the shaft against rotation,substantially as specified.

2. In a crank box, in combination with the box proper, a yoke mounted insaid box, a weighted pawl pivoted between the respective ends of theyoke, said yoke supporting a boss, gears in mesh mounted upon the boss,an operating shaft, one of the gears being adapted for driving theoperating shaft, a crank handle for operating the other gear,

a shaft carried by the crank handle, said shaft having a handle upon oneend and an arm upon its other end, the arm upon the shaft being adaptedto engage a liange carried by the pawl, and means for locking the hfftagainst rotation, substantially as speci- 1e 3. In a crank box, thecombination with the box proper, a yoke mounted in said box, said yokehaving a boss formed integral therewith, a weighted pawl pivoted betweenthe respective ends of the yoke, said pawl having a flange, gears inmesh mounted upon said boss, an operating shaft, one of the gears beingadapted to drive the operating shaft,4 a crank handle for operating theother gear, a shaft carried by said crank handle, a handle upon one endof the shaft carried by the crank, and an arm upon the other end of saidshaft, the arm being adapted to engage the flange upon the pawl, andmeans for locking the shaft carried by the crank against rotation,substantially as shown and for the purpose specified.

NATHANIEL ROE. Witnesses:

Jol-IN J. Ron, FANNIE C. OVERTON.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of'latents, Washington, D. C.

